Earlier this week, seemingly out of nowhere, former UFC welterweight champion B.J. Penn blew a gasket on his official Twitter account, unloading on UFC 137 opponent Nick Diaz, who, according to the outspoken Hawaiian, fought like a coward against a smaller man.

"Penn vs. Diaz" was the main event headliner back on October 29, 2011, at Mandalay Bay Events Center in Las Vegas, Nevada. The unanimous decision win for Diaz, which left Penn battered and bruised, sent him straight into an Interim title bout against Carlos Condit at UFC 143.

And sent "The Prodigy" straight into semi-retirement.

Now that Penn has opened some old wounds, the Gracie camp, which houses the Diaz brothers, among others, have responded in kind via their official website, telling B.J. it's time to "come to terms with his beating."

Check it out:

BJ Penn has apparently not come to terms with the beating he received at the hands of Nick Diaz. At some point it is up to those around you to protect you from yourself. To take you aside and let you know you are wrong and help save you from your folly. Unfortunately for Penn he is surrounded by 'Yes Men' that are unwilling to do that. The outcome will be predictable, resulting in a fighter that will never push himself to the fullest and will always have excuses for his losses.

Following the UFC 137 main event, Cesar Gracie, trainer and manager for Diaz, invited Penn to be a part of their camp in 2012. Penn promptly denied the offer and returned to Hawaii to do his own thing.

In the aftermath of Georges St. Pierre's knee injury, Condit and Diaz were paired off to find out who will rule the roost in his absence. As for Penn, well, that remains to be seen.

After hearing from both parties, whose side are you taking?